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Bt toxin is coded by a gene named cry....

Bt toxin is coded by a gene named cry.

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**Step-by-Step Solution:** 1. **Identify the Organism:** The question refers to Bt toxin, which is produced by a specific bacterium known as *Bacillus thuringiensis* (commonly abbreviated as Bt). 2. **Understand the Function of Bt:** The bacterium *Bacillus thuringiensis* is known for its ability to produce a toxin that is effective against certain insect pests. This toxin is used as a biological pesticide. 3. **Locate the Gene Responsible for Toxin Production:** The gene that encodes the Bt toxin is known as the cry gene. This gene is responsible for the production of the toxic proteins that are harmful to specific insects. 4. **Conclusion on the Statement:** Since the statement claims that Bt toxin is coded by a gene named cry, and we have established that the cry gene indeed codes for the Bt toxin produced by *Bacillus thuringiensis*, we can conclude that the statement is correct. 5. **Final Answer:** The statement "Bt toxin is coded by a gene named cry" is true. ---
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Bt-toxin is a

B. thuringiensis forms protein crystals during a particular phase of their growth. The toxin is coded by a gene named cry. There are a number of them. Which is not an example of such plants ?

Knowledge Check

  • Consider the following statements. A. Bt toxin is produced by a bacterium called Bacillus thuringiensis. B. The Bt toxin is coded by a gene named cry. C. Bt inactive toxin is converted into an active form of toxin due to the acidic pH of the insect gut. D. The Bt proteins encoded by the genes cryIAc and cryIIAb control the corn borer. Of the above statements:

    A
    B and C are correct
    B
    B and D are correct
    C
    A and B are correct
    D
    A and D are correct

  • Bt toxin is a

    A
    crystalline, proteinaceous , insecticidal `beta` endotoxin
    B
    amorphous , proteinaceous , insecticidal `delta` endotoxin
    C
    crystalline, proteinaceous , insecticidal `delta` endotoxin
    D
    amorphous , proteinaceous , insecticidal `beta` endotoxin

  • Consider the following statements. I. Specific Bt toxin genes have been isolated from Bacillus thuringiensis. II. Bt toxin in coded by a gene named cry III. Bt toxin protein exists as inactive protoxins. Which of the following statements given above are correct ?

    A
    I, II and III
    B
    I and II
    C
    I and III
    D
    II and III

    • Similar Questions

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    Bt toxin is produced by :

    Bt toxins are

    Bt toxin is produced by a bacterium called Bacillus thuringiensis ( Bt for short). These Bt toxin crystals contain by a gene named cry which has many variants. Which one from the following produces a toxin that controls corn borer ?

    Bt toxin is got from a

    Select the statements that are incorrect regarding Bt toxin. (1) The toxin is made by the eukaryotic organism (2) The toxin is a protein and insecticidal. (3) they are produced in the active form. (4) The toxin is coded by the cry gene.

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